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# Can u help me size this steam radiator

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Member Posts: 278
I have a customer with old cabinet radiators with steel convectors being used for steam. cant find it in Dan's Edr book. The steel element is 6 inches in depth, 8 inches high and 29 inches wide. The cabinet its contained in is 22 inches high x 32 inches wide
thanks
Joe

• Member Posts: 23,544
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pictures?
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
• Member Posts: 16,943
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Post a pic including with the cover off. There were many different variations of the basic convector. Also, did you see any name or trademark on it?
All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting
• Member Posts: 278
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• Member Posts: 278
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couldnt find name
Joe
• Member Posts: 278
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any ideas?
• Member Posts: 23,544
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No specific ideas -- but you can get a decent estimate of the EDR of that thing by taking the surface area of a fin -- count both sides -- and multiplying by the number of fins. Convert to square feet from square inches. Now -- that will be somewhat high, but not wildly so, but is only valid if the convector cover is on and the openings into that cover are not obstructed in any way.
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
• Member Posts: 278
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can u explain using the surface area of one fin that 6 x 8 inches and say there are 300 fins thx. dont i still need to know radiation of each fin?
Joe
• Member Posts: 926
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6”x8”=48 sq.in. x 2 sides=96 sq. in. per fin.

96 sq. in. / 144 sq. in. per sq. ft. = 0.666 sq. ft. per fin

0.666 sq. ft. x 300 fins = 200 sq. ft.

Bburd
• Member Posts: 23,544
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Or you could alter the sequence of calculation -- the EDR of each fin is 0.666. Then just add them up...
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
• Member Posts: 16,943
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All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting